以检查 KSOAP2 网络服务是否已启动并运行

Question

    private String METHOD_NAME = "schedule";
    private String NAMESPACE = "http://calculate.backend.web.org";
    private String SOAP_ACTION = NAMESPACE + METHOD_NAME; 
    private static final String URL = "http://192.168.0.4:8080/AndroidBackEnd/services/Calculate?wsdl";
SoapObject request = new SoapObject(NAMESPACE, METHOD_NAME);
            request.addProperty("username",username);
            SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);
            envelope.dotNet = true;
            envelope.setOutputSoapObject(request);
            HttpTransportSE androidHttpTransport = new HttpTransportSE(URL);
            androidHttpTransport.call(SOAP_ACTION,envelope);
            Object result = envelope.getResponse();

如何验证 WEB 服务是否已从客户端启动并运行？

Answer 1

如果您的网络服务关闭，则 Android 会在无法连接到它时抛出SocketTimeoutException。

您可以通过以下方式手动设置连接的超时持续时间

HttpTransportSE androidHttpTransport = new HttpTransportSE(URL, timeoutDuration);

或者让连接在其默认超时持续时间后超时。

因此，您可以在代码中捕获该异常，并了解 Web 服务已关闭。